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In the extraction of copper from its sulphide ore, metal is finally obtained by the oxidation of cuprous sulphide with -

1. SO2
2. Fe2O3
3. Cu2O
4. CO

Correct answer: Cu2O

Solution

In the Bessemerisation step copper is obtained by self-reduction: 2Cu2O + Cu2S -> 6Cu + SO2. Here cuprous sulphide is oxidised by cuprous oxide (Cu2O), so the oxidising agent is Cu2O.

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